Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Stock-Based Compensation

Schedule of stock based compensation expense categories in statement of operations

The Company recorded stock‑based compensation expense in the following expense categories of its accompanying consolidated statements of operations (in thousands):

	Year ended December 31,
	2020		2019		2018
Sales and marketing	$	696	$	164	$	68
General and administrative		1,030		225		115
Research and development		332		68		33
Total stock‑based compensation	$	2,058	$	457	$	216

Schedule of stock option activity

				Weighted
				average
		Weighted		remaining
	Number of	average exercise		contractual term
	shares	price per share		(years)
Outstanding at January 1, 2018	350,914	$	5.81
Granted	152,016		5.93
Exercised	(1,377)		5.57
Early exercised	(427)		5.93
Canceled/forfeited	(11,904)		5.93
Outstanding at December 31, 2018	489,222		5.84
Granted	978,415		12.51
Exercised	(2,527)		5.93
Early exercised	(471)		5.93
Canceled/forfeited	(43,697)		8.58
Outstanding at December 31, 2019	1,420,942		10.35
Granted	175,086		15.03
Exercised	(27,783)		6.29
Canceled/forfeited	(70,037)		12.41
Outstanding at December 31, 2020	1,498,208	$	10.87	7.95
Vested and expected to vest at December 31, 2020	1,439,422	$	10.80	7.91
Exercisable at December 31, 2020	647,987	$	8.40	6.80

Schedule of activity relating to early exercise of stock options

	Number of
	shares
Unvested balance at January 1, 2018	1,034
Early exercised	427
Vested	(549)
Unvested balance at December 31, 2018	912
Early exercised	471
Vested	(628)
Unvested balance at December 31, 2019	755
Vested	(306)
Forfeited	(267)
Unvested balance at December 31, 2020	182

Schedule of weighted average assumptions

	Year ended December 31,
	2020		2019		2018
Expected dividend yield	—		—		—
Expected volatility	59.1	%	55.9	%	56.5	%
Risk‑free interest rate	0.87	%	1.82	%	2.77	%
Expected term (in years)	5.98		6.24		6.25